@@ -111,8 +111,9 @@ noinst_HEADERS = \
include/odp_posix_extensions.h \
include/odp_queue_internal.h \
include/odp_queue_scalable_internal.h \
- include/odp_ring_internal.h \
include/odp_queue_if.h \
+ include/odp_ring_internal.h \
+ include/odp_ring_st_internal.h \
include/odp_schedule_if.h \
include/odp_schedule_scalable.h \
include/odp_schedule_scalable_config.h \
new file mode 100644
@@ -0,0 +1,118 @@
+/* Copyright (c) 2018, Linaro Limited
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef ODP_RING_ST_INTERNAL_H_
+#define ODP_RING_ST_INTERNAL_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <odp/api/hints.h>
+#include <odp_align_internal.h>
+
+/* Basic ring for single thread usage. Operations must be synchronized by using
+ * locks (or other means), when multiple threads use the same ring. */
+typedef struct {
+ uint32_t head;
+ uint32_t tail;
+ uint32_t mask;
+ uint32_t *data;
+
+} ring_st_t;
+
+/* Initialize ring. Ring size must be a power of two. */
+static inline void ring_st_init(ring_st_t *ring, uint32_t *data, uint32_t size)
+{
+ ring->head = 0;
+ ring->tail = 0;
+ ring->mask = size - 1;
+ ring->data = data;
+}
+
+/* Dequeue data from the ring head. Max_num is smaller than ring size.*/
+static inline uint32_t ring_st_deq_multi(ring_st_t *ring, uint32_t data[],
+ uint32_t max_num)
+{
+ uint32_t head, tail, mask, idx;
+ uint32_t num, i;
+
+ head = ring->head;
+ tail = ring->tail;
+ mask = ring->mask;
+ num = tail - head;
+
+ /* Empty */
+ if (num == 0)
+ return 0;
+
+ if (num > max_num)
+ num = max_num;
+
+ idx = head & mask;
+
+ for (i = 0; i < num; i++) {
+ data[i] = ring->data[idx];
+ idx = (idx + 1) & mask;
+ }
+
+ ring->head = head + num;
+
+ return num;
+}
+
+/* Enqueue data into the ring tail. Num_data is smaller than ring size. */
+static inline uint32_t ring_st_enq_multi(ring_st_t *ring, const uint32_t data[],
+ uint32_t num_data)
+{
+ uint32_t head, tail, mask, size, idx;
+ uint32_t num, i;
+
+ head = ring->head;
+ tail = ring->tail;
+ mask = ring->mask;
+ size = mask + 1;
+ num = size - (tail - head);
+
+ /* Full */
+ if (num == 0)
+ return 0;
+
+ if (num > num_data)
+ num = num_data;
+
+ idx = tail & mask;
+
+ for (i = 0; i < num; i++) {
+ ring->data[idx] = data[i];
+ idx = (idx + 1) & mask;
+ }
+
+ ring->tail = tail + num;
+
+ return num;
+}
+
+/* Check if ring is empty */
+static inline int ring_st_is_empty(ring_st_t *ring)
+{
+ uint32_t head, tail, num;
+
+ head = ring->head;
+ tail = ring->tail;
+ num = tail - head;
+
+ if (num == 0)
+ return 1;
+
+ return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif